There are actually laws prohibiting non-banks from using the word "bank" in their name. A lot of bank holding companies (which are not, technically, banks) got around this by replacing the "k" in "bank" with a "c" -- such as "BancAmerica Corp". I'm sure we all breathed a sigh of regulatory relief seeing that "c" there.

Nitpicking: simpel.nl is actually a word joke, because they sell SIM-only cell phone subscriptions. So in effect their name does convey more meaning than "Simple" does, so it doesn't really belong in your list :)